World's Top 20 Oil Companies

June 24, 2014 5:38 PM

Photo: DigitalGlobe/Associated Press

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20. Petroliam Nasional Berhad (Petronas) -- state oil company of Malaysia
2012 rank -- 20
[Photo: A worker unloads an empty Petronas gas cylinder at a shop in Ampang, in the suburbs of Kuala Lumpur on November 14, 2013.] less

20. Petroliam Nasional Berhad (Petronas) -- state oil company of Malaysia
2012 rank -- 20
[Photo: A worker unloads an empty Petronas gas cylinder at a shop in Ampang, in the suburbs of Kuala Lumpur on ... more

18. Abu Dhabi National Oil Company (ADNOC) -- national oil company of the United Arab Emirates
2012 rank -- 18
[Photo: With an oil tanker in background, fishermen cross the sea waters off Fujairah, United Arab Emirates in 2012.] less

18. Abu Dhabi National Oil Company (ADNOC) -- national oil company of the United Arab Emirates
2012 rank -- 18
[Photo: With an oil tanker in background, fishermen cross the sea waters off Fujairah, United ... more

14. Sonatrach -- national oil company of Algeria
2012 rank -- 14
[Photo: A satellite image shows the Amenas Gas Field in Algeria, which is jointly operated by BP and Norway's Statoil and Algeria's Sonatrach.]

14. Sonatrach -- national oil company of Algeria
2012 rank -- 14
[Photo: A satellite image shows the Amenas Gas Field in Algeria, which is jointly operated by BP and Norway's Statoil and Algeria's Sonatrach.]

13. Petróleo Brasileiro S.A. (Petrobras) -- semi-public oil company of Brazil
2012 rank -- 15
[Photo: Then-Brazil President Luiz Inacio Lula da Silva (center) waves a national flag next to his wife Marisa Leticia, while posing for a picture with workers of the Brasil-Fels shipyard who built the Petrobras oil platform P-51 in 2008.] less

11. Petróleos Mexicanos (Pemex) -- national oil company of Mexico
2012 rank -- 11
[Photo: An oil worker holds the hook of a crane at the Centenario deep-water drilling platform off the coast of Veracruz, Mexico in 2013.] less

11. Petróleos Mexicanos (Pemex) -- national oil company of Mexico
2012 rank -- 11
[Photo: An oil worker holds the hook of a crane at the Centenario deep-water drilling platform off the coast of Veracruz, ... more

9. Chevron -- international oil company based in the United States
2012 rank -- 8
[Photo: A couple watches tug boats transport the Chevron Corp. Jack St. Malo semi-submersible drilling and production platform to the Gulf of Mexico.] less

9. Chevron -- international oil company based in the United States
2012 rank -- 8
[Photo: A couple watches tug boats transport the Chevron Corp. Jack St. Malo semi-submersible drilling and production platform ... more

Photo: Eddie Seal, Bloomberg

9. Chevron -- international oil company based in the United States... Photo-5520811.74938 - Houston Chronicle

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8. Gazprom -- partially state-owned oil company in Russia
2012 rank -- 10
[Photo: The logo of Russia's state-controlled gas giant Gazprom is displayed in front of the building of Russia's government in Moscow.] less

8. Gazprom -- partially state-owned oil company in Russia
2012 rank -- 10
[Photo: The logo of Russia's state-controlled gas giant Gazprom is displayed in front of the building of Russia's government in ... more

7. Royal Dutch Shell -- international oil company based in the Netherlands
2012 rank -- 7
[Photo: Peter Voser, chief executive of Royal Dutch Shell speaks during a press conference in London in May 2013.]

7. Royal Dutch Shell -- international oil company based in the Netherlands
2012 rank -- 7
[Photo: Peter Voser, chief executive of Royal Dutch Shell speaks during a press conference in London in May 2013.]

Photo: BEN STANSALL, AFP/Getty Images

7. Royal Dutch Shell -- international oil company based in the... Photo-5520813.74938 - Houston Chronicle

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6. BP, international oil company based in the United Kingdom
2012 rank -- 6
[Photo: Bob Dudley, group chief executive at BP, speaks at IHS CERAWeek 2013 conference in Houston.]

6. BP, international oil company based in the United Kingdom
2012 rank -- 6
[Photo: Bob Dudley, group chief executive at BP, speaks at IHS CERAWeek 2013 conference in Houston.]

Photo: Johnny Hanson, Houston Chronicle

6. BP, international oil company based in the United Kingdom
2012... Photo-5520814.74938 - Houston Chronicle

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5. Petróleos de Venezuela, S.A. (PDVSA) -- national oil company of Venezuela
[Photo: A worker is seen busy at the nitrogen plant of the refinery at Puerto la Cruz, 200 km from Caracas in 2008.]

5. Petróleos de Venezuela, S.A. (PDVSA) -- national oil company of Venezuela
[Photo: A worker is seen busy at the nitrogen plant of the refinery at Puerto la Cruz, 200 km from Caracas in 2008.]

3. Exxon Mobil -- international oil company based in the United States
2012 rank -- 3
[Photo: Gas prices are displayed at an Exxon station in Pittsburgh.]

3. Exxon Mobil -- international oil company based in the United States
2012 rank -- 3
[Photo: Gas prices are displayed at an Exxon station in Pittsburgh.]

Photo: Gene J. Puskar, Associated Press

3. Exxon Mobil -- international oil company based in the United... Photo-5520817.74938 - Houston Chronicle

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2. National Iranian Oil Company (NIOC) -- national oil company of Iran
2012 rank -- 2
[Photo: Iranian oil technician Majid Afshari makes his way to the oil separator facilities in Iran's Azadegan oil field southwest of Tehran, Iran.] less

2. National Iranian Oil Company (NIOC) -- national oil company of Iran
2012 rank -- 2
[Photo: Iranian oil technician Majid Afshari makes his way to the oil separator facilities in Iran's Azadegan oil field ... more

1. Saudi Aramco -- national oil company of Saudi Arabia
2012 rank -- 1
[Photo: Employees of the Saudi Aramco oil company prepare for the first day of the Arab Oil and Gas exhibition in Dubai, United Arab Emirates in 2007. ] less

1. Saudi Aramco -- national oil company of Saudi Arabia
2012 rank -- 1
[Photo: Employees of the Saudi Aramco oil company prepare for the first day of the Arab Oil and Gas exhibition in Dubai, United Arab ... more